iv Manual Change Information Date Code 20001006
SEL-351 Instruction Manual
Revision
Date
Summary of Revisions
990827 This revision includes the following changes:
Updated MIRRORED BITS™ format throughout to reflect new trademark.
Section 3:
− Added explanation to the Synchronism Check Elements subsection for the new
angle setting option for the SYNCP (synchronizing phase) setting.
Synchronism check can now be accomplished for synchronism check voltage
input VS connected phase-to-phase or beyond a delta-wye transformer. Setting
SYNCP accounts for the constant angle difference between reference voltage
VA and synchronism check voltage input VS.
Section 9:
− Expanded the setting range for the SYNCP (synchronizing phase) setting to
accommodate compensation angle settings for synchronism check (Settings
Sheet 9 of 24).
− Added the MB8A and MB8B serial port protocol settings options for
MIRRORED BITS protocol operating on communication channels requiring an
eight bit data format (Settings Sheet 24 of 24).
Appendix A:
− Updated Firmware Version information.
Appendix B:
− Updated Firmware Upgrade Instructions.
Appendix H:
− Updated screen capture on page H-14.
Appendix I:
− Explained the MB8A and MB8B serial port protocol settings options for
MIRRORED BITS protocol operating on communication channels requiring an
eight data bit format.
990511 This revision includes the following changes:
Incorporated the following changes into Table 9.10 in Section 9: Setting the
Relay.
− Added Relay Word bit rows (36) and (44) for models 0351x0, 0351x1, and
0351xY.
− Changed INT3P to INB in Relay Word Bit row 48 (52).
− Inserted * as necessary throughout table to indicate unused Relay Word bits.
Courtesy of NationalSwitchgear.com
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